Exam Prep Flashcards
According to the codes and standards adopted and incorporated by reference of the boiler pressure vessels and refrigeration regulations, welded repairs and any alternations made to the boilers must comply with what?
The original Code of construction when it was built
According to the law, how often must all steam or hot water boilers shall be inspected in the state of New Jersey?
Once every year at 12 month intervals from pervious inspection
According to the regulation, a licensed operator on watch shall give constant attention and remain within sight and natural sound in both HP and LP boilers
False
The examining board of the mechanical inspection bureau of boiler and pressure vessel compliance may consider an applicant experience of an equivalent amount for grade or classification from some other jurisdictional authority (state or federal).
True
The maintenance of automatic direct fired boilers is covered under what document?
ASME CSD-1
Once specific safety practice incorporated by reference for licensed operators specifies and identifies one called a qualified individual. How is the qualified individual identified in this reference?
A boiler service technician who is engaged in and responsible for the installation, replacement, repair or service of the boiler, fuel burning controls, and safety devices and is experienced in such work. In some states this individual must also hold an appropriate boiler operator’s
license.
The various license classifications and grades for operating high pressure boilers are found in the NJAC reference section listed as:
Table 3.4
To be eligible for HP boiler operator in charge examination, what is the duration of time indicated in the regulations that an applicant must have for an intensive training program established by the Chief Engineer and approved by the Bureau of Boiler Pressure Vessel Compliance?
For a period of no less than 6 weeks
What ASME code symbol is used to denote a high pressure power boiler?
S
What is the Act (Law) that establishes the licensing requirements in the state of NJ for Stationary, Power Engineers, Refrigeration Engineers and Boiler Operators?
N.J.S.A 34:7-1
What is the max penalty that may be imposed for performing the duties of a licensed operator with an expired license?
$5000
What is the penalty if a person taking the exam is found taking photos of the test?
Any person using fraudulent means to obtain a license shall be subject to prosecution and or penalty up to $5,000. Any license shall be invalid
What is the range of capacity that a High Pressure Boiler Operator can be the Chief Engineer and work as Shift Engineer (stand watch) based on the
12:90 Boiler, Pressure Vessel and Refrigeration rules?
Can act as Chief Engineer and stand watch of a plant with a minimum capacity of 100 HP and up to 500 HP
What is the regulation corresponding to boiler, pressure vessels and refrigeration systems in New Jersey?
New Jersey Administrative Code (NJAC) 12:90
Any person found performing the duties of a license and holding an expired license, shall be subject to what type of penalty?
They shall be subject to a min penalty of $500 up to a max of $5,000 per day.
Air receivers must conform to what ASME Code?
Section VIll or section 8
If your boiler needs welded repairs, you must get approval for such repairs from the:
authorized inspection agency
In accordance with ASME CSD-1, where is the installation of a manually operated remote shutdown switch or circuit breaker to be located?
Just outside the boiler room door, unless the door is on the building exterior and it must be marked for easy identification and installed on every exit door of the boiler room.
Pursuant to N.J.A.C. 12:90, what is the temperature and pressure that defines a high-temperature hot water heating boiler?
exceeds 250 degrees F at 160 psi
Is it necessary to provide a disconnect switch at an accessible location at the boiler?
An electrical disconnect switch shall be installed at the boiler at an accessible location with a cover plate that can be locked out in the open
Position
When a license is improperly or not posted what is the amount of penalty or fine that may be imposed on the Engineer, by the state?
$500
When preparing a boiler for a hydrostatic test, what is the best temperature for the boiler water?
75 degrees F
Where in the NJ Administrative Code (NJAC) are the duties of licensed persons established?
N.J.A.C. 12:90-3.10
Which is the act that a Mechanical Inspection Bureau exists in New Jersey?
The New Jersey Statute Annotated (NJSA) 34:1-38.1
Who is responsible for obtaining pertinent operating, testing, servicing, and cleaning instructions for the controls and safety devices?
It is the responsibility of the installing contractor to deliver all the instructions to the equipment owner/user
Therefore, a column of water 1-inch square and 1-foot high weighs how much?
0.433 lbs
By ASME code, the size of the water column connections to a boiler must be a minimum of:
1 inch
What is the proper procedure for returning a gauge glass to service, after installing a new glass?
open the drain and crack open the top valve
When a low-water fuel cutoff (LWFCO) has activated on a hot water heating boiler what shall happen?
Operation of the LWFCO shall cause a safety shutdown and lockout, requiring a physical manual reset
What would occur if there was a drop in the velocity of the liquid flowing through a heat exchanger?
the temperature of the liquid would increase
Which of the following could cause a tube in a high-temperature hot water boiler to overheat?
Poor circulation
Which of the following is the proper method for testing a low-water cut-off device on a steam boiler?
Lower the water level in the boiler until the burner shuts down
Which of the following valves is used in a steam feedwater supply line to control the direction of fluid flow and prevent backflow in a system?
Check Valve
Most steam boilers are equipped for the gauge glass and water column to be blown down. Generally, the operating rules recommend that the water column and gauge glass be blown down how often?
Once a Day
What is the basic function of the low water cut-off device?
To shut off the fuel supply to the burner
A three-element feedwater regulator is controlled by what means?
Steam flow, feedwater flow, and drum level
A two-element feedwater regulator is controlled by what means?
Water level and Steam flow rate
What condition would cause a feedwater pump to become vapor bound?
The feedwater temperature is too hot
What device is used on a deaerator to prevent water from backing up into the steam line?
An Overflow Device
What is the function of a vent condenser on a deaerating feedwater heater?
To condense steam that would escape through the vent
A two-element feedwater control device responds to the boiler drum level and feedwater flow. True or False
False
On a boiler feedwater line, what type of valve is used closest to the boiler?
A stop valve
In your boiler plant you have pumps that are used for numerous applications. One of the pumps has a small amount of liquid coming from the packing gland. Is this normal or is it a problem?
This is normal and is necessary to lubricate and cool the packing.
A thermal expansion feedwater regulator operates by:
The expansion and contraction of a thermostatic element
What would one standard atmosphere at 14.7 psi be equivalent to in feet of water?
34 Feet
Which statement best describes the operation of a closed feedwater heater?
The steam and water do not mix
While making a round of your boiler room, the boiler feedwater pump is making a strange noise. The pump casing and the temperature of the water has risen above normal. What would most likely cause this problem?
Pump cavitation issue
When taking over a shift, the boiler operator must first check:
Water level on all boilers online by blowing down the water column and gauge glass
What water treatment chemical is used to control alkalinity in boiler feedwater?
caustic soda
Where is caustic embrittlement most likely to occur?
on a riveted joint below the water line
On a pH scale what number would represent the most acidic of a solution of feedwater?
The most acidic would be O.
In a boiler plant system, what is the measure of the degree of acid or base of a solution called?
This would be called the pH level
What should new or re-tubed boilers be cleaned with?
• an alkaline detergent solution
Which of the following would cause scale to form in a low pressure boiler?
Calcium and magnesium
As solids and alkalinity in boiler water increase:
waterside scaling is increased
What chemical would be used to control scale in a low pressure boiler?
Phosphate
What will excessive oxygen in the boiler water cause to take place?
pitting of boiler metal
What chemical should be added to boiler feedwater to prevent oxidation of the boiler drum and tubes?
sodium sulfite
What water treatment chemical is used to control alkalinity in boiler feedwater?
caustic soda
By N.J.A.C. 12:90 rules, what is the minimum thickness allowed for atmospheric type blowdown tank?
5/16 inch
In the State of New Jersey, when is it permissible to have only one bottom blow off valve on a boiler?
when the MAWP does not exceed 100 psi
N..A.C. 12:90 requires that sewer lines be protected from high temperatures and pressure coming from boiler blow-off lines. What device is used for this purpose?
a blowdown tank
What effect would frequent blowing down of a boiler have on the system?
blow down heat loss
The maximum size of the bottom blowdown line and the surface blowdown line is:
2.5”
As the firing rate increases in a boiler equipped with a convection type superheater, the steam temperature:
increases
Before a hydrostatic test is performed on a boiler, each safety valve should be:
held to its seat by means of a testing clamp
What boiler should never be subjected to an accumulation test?
a boiler equipped with a superheater
What is the difference between the set-point pressure at which a safety valve opens and the pressure at which this valve closes called?
blowdown
What is the function of a dry pipe in a boiler?
to remove moisture from the steam drum
What part of a safety valve is used to ensure the valve seats properly?
the guides and bushings
A safety valve data nameplate suggests that the orifice opening on the valve is 1.5 inches w/ a set pressure of 98 psig. What’s the total force acting on the valve?
173 Ibs
If a boiler has an operating pressure of 345 psi and a 2 1/2-inch diameter safety valve, what is the total force acting on the safety valve?
1,693.5 lbs
If one atmosphere is about 14.7 psia what is the standard barometer reading at sea level equal to?
760 mm. Hg
If steam were reduced by a PRV from 500 psi to 125 psi, the steam at 125 psi would have:
the same heat as at 500 psi
In steam piping, which type of steam trap has no moving parts?
the continuous flow type
On a steam boiler in order to prevent the generation of steam greater than the maximum working pressure requires activation of what device?
The high steam pressure limit control
The ASME code requires more than one safety valve on a boiler, when the boiler has:
over 500 square feet of heating surface
In what units of measurement are vaporstat type pressure switches calibrated in?
inches of water
The steam pressure on a safety valve acts upon upperside of the valve disc, which is held down upon the seat by a spring that pushes down.
False
Steam at 100 psi and 400 degrees F would be considered:
superheated steam
How often should the safety valves on a power boiler be test blown?
at least once a month
A boiler with an MAWP of 150 psi and a safety valve setting of 100 psi with a 3” valve disc - what would be the total force needed to open the safety valve against opposing spring force?
707 lbs
What is the purpose of a siphon on a steam pressure gauge?
to protect the gauge from high steam pressure
Water hammer (or other fluid hammer) is a dangerous condition that could result in:
Lead to total failure of the piping hangers and support structures.
A boiler produces 500 psi steam at 625 degrees F, normal saturated steam condition is 467 degrees F, What is the degree of superheat?
© 158 degrees F
A “water hammer” condition in a steam plant is dangerous because it can:
lead to steam pipe failure
Which of the following is not an advantage of steam heating systems?
only small pumps are needed to move steam.
What is the function of the thrust bearing on a steam turbine?
To maintain the axial position of the rotor
What is the horsepower rating of a 10,000 kW steam turbine?
13,400 hp
What is the theoretical cycle of a simple power plant?
Rankine cycle
What is the stationary passage of an impulse turbine called?
Nozzle
What prevents superheater tubes from warping or burning out?
By keeping a continuous flow of steam through the superheater tubes
What type of turbine allows for the reclaiming of condensate for use in the system?
a condensing turbine
In a high pressure steam plant, in which type of condenser would the cooling water and steam come into direct contact?
An open type
On a turbine driven feedwater pump, identify which two pipes are larger?
Turbine steam exhaust and pump suction lines
What would be the over-speed trip setting on a turbine with a normal operating speed of 1770 rpm?
• 1947 rpm
Shrouds are found on what pieces of auxiliary equipment?
Steam turbines
Where in a boiler system would you find a cyclone separator?
In the steam drum
Which of the following best describes the operation of a surface condenser?
Cooling water flows through tubes surround by exhaust steam
Which of the following auxiliary equipment, would you find an atmospheric relief valve?
A turbine condenser
Which of the following devices would be found on the inlet line of a steam turbine?
An atmospheric relief valve
Which of the following would cause a superheater tube to overheat?
Dirty tube
Which formula would you use to
calculate the Btu/b heat content
of fuel oil?
17,687 + 57.7 × API @ 60
degrees F
A boiler with a steaming capacity of 27,117 Ibs/hr would be rated at
how many boiler horsepower?
786
One mechanical horsepower is
equal to:
33,000 ft-lb/min
The purpose of backseating a
manual valve in an operating
system is to:
isolate system pressure from the packing stuffing box to minimize packing leakage.
What is the heating surface of
water-tube, with a diameter of 3
1/2 inches and a length of 20
feet?
18.32 sq. ft
Boiler manways and handholes are oval for what reason?
for removal from the
pressure vessel
Which of the following best
describes the operation of a
surface condenser?
cooling water flows ( through tubes surround by exhaust steam
What is the total horsepower of a
plant that has three 350 hp
boilers and one 500 kW steam
turbine?
1720 hp
How much heat is required to
change 2,500 lb of water to
steam at 212 degrees?
2,425,750 Btu
How many Btu is needed to
change 5 pounds of water from
ice at 0 degrees F to 212 degrees
F steam?
6,550 Btu
In a cooling water system when comparing a 3-inch gate valve to
a 3-inch globe valve used for the
same application in the process, which statement below is correct
if both valves were fully open?
The globe valve produces the larger head loss and the smaller flow rate.
A 2 1/2 - inch boiler tube has a
shell wall thickness of 3/16-inch, what is its inside diameter?
2-1/8 inches
What is the quantity of heat
needed to raise 40 pounds of air
from 60 degrees F to 550
degrees F?
4,704 Btu
If a power boiler has a burner
input of 6,900,000 Btu/hr, what would be its HP rating?
200 HP
